Safety-valve for pneumatic tubes.



"No. 726,072. PATENTED APR. 21; 1903. A A. KOENIG. I

SAFETY VAL E FOR PNEUMATIC TUBES. I

APPLICATION IILBD JAN. 16, 1902.

80 MODEL. 2 snnn'rs-snnm 1.

m: wogms Pzrzns co. Pumoumou wxsamsrou. 0.1:v

. No. 726,072. PATBNTBD APR. 21, 1903.;

- A. KOENIG.

SAFETY VALVE FOR PNEUMATIC TUBES.

APPLICATION FILED JAN. 16, 1002. 11010021.. z'snms-snnn-r 2. I

PATENT OFFICE.

AUGUST KOENIG, OF LOWVELL, MASSACHUSETTS, ASSIGNOR TO LAMSON CON- SOLIDATED STORE SERVICE COMPANY,

CORPORATION OF NEW JERSEY.

:OF NEWARK, NEV JERSEY, A

SAFETY-VALVE FOR PNEUMATIC TUBES.

SPECIFICATION forming part of Letters latent No. 726,072, dated April 21, 1903. Application filed January 16, 1902. Serial Noi89g940i (No model.)

To all whom it mag concern:

Be it known that I, AUGUST KOENIG, of Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Safety-Valves for Pneumatic Tubes, of which the following is a specification.

My invention relates to new anduseful improvements in pneumatic-tube apparatus, and its main object is to provide a safetyvalve for the terminals of pneumatic tubes whereby in the case of repairs or carriers becoming stuck in the terminal the current may be out oh? and the hand inserted to push the :5 carrier along or to make repairs without danger of accident from thetraveling carriers coming from the transmission-tube into the 7 terminal.

Another object is ito arrange. an impactzo valve on an incline and which is more readily.

opened by the traveling carrier than avalv'e arranged straight acrossthe tube in the usual manner.

My invention consists of certain novel fea- 2 5 tures hereinafter described, and particularly pointed out in the claims. 7

In the accompanying drawings,which illustrate a construction embodying my invention, Figure l is a sectional view of v a terminal 3o provided with myimproved safety-valve and impact-valve located at an angle of about forty-five degrees, the parts being in a position to receive a carrier from the transmission-tube into the terminal. Fig. 2 is a side 55 view mostly in section and showing the safety-valve'opened, so that the hand can be inserted within the terminal for any purpose desired.

Like letters of reference refer to like 40 throughout both views. I 7

To the table A is secured theterminal B, with which communicates thetransmissiontube 0, through which carriers pass from the opposite-station'into'the terminal 13 by the vacuum. This tube 0 as well as the returntube D are secured to the casting F, and said tubesare provided with openings E, by which communication is established between the tubes through the casting F. Outlet end parts of the terminal B is closed by a valve G,

pivoted at I to the arm G, which is pivoted at H to the terminal, and said valve is normally held in its closed position by the spring H. This valve acts as a mufflerthat is, it muffles the sound of the carrier striking the valve 0 and cushions the carrier, so that it passes slowly from the terminal. This "alve O is pivoted at O and rests at an angle of forty-five degrees on the sleeve P and closes the outlet from said sleeve, which atitslower end encircles the upper end of the transmission-tube C. By arranging the valve 0 in this inclined position the carrier strikes and opens it easier than with a valve which is arranged straight across the transmissiontube in the usual manner. It is found in practice in a five-i'nch-vacuum system that with the valve inclined as shown only onehalf of the, pressure is required to operate the systemas where the valve is arranged straight across the tube in the terminal, and, further, that with this inclined valve the carriers strike easier and make much less noise. The upper end of the return-tube D is closed by the valve L, pivoted at M, and to said valve there is pivoted at K the fork-lever K, which passes around each side of the terminal and is pivotally secured at its front end K to the door J, which normally closes the opening K in the terminal B. When the valve L is closed, as shown in Fig. 1, the circuit of air is through the tube 0, through the openings E, casting F, and down through the tube D, so that the carriers inserted into the. tube are drawn along and pass into'the terminal B and discharge therefrom. When, however, one or more carriers become stuck in the terminal and do not pass therefrom, or it be desired to make repairs, the door J is opened by operating the lock J and moving 0 it to the position shown in Fig. 2,wh ich causes the opening of the valve L, and the parts take the position shown in'Fig.'"2. By opening the valve L the suction between the tube 0 and tube D is broken, as the suction through the 5 tube D is satisfied by the atmospheric air and the carriers would not be drawn along the tube 0, so that the hand can be inserted into the terminal B above the valve 0 and the carriers given sufficient push to cause the same to pass around and open the valve G. When the terminal is free of carriers or the desired repairs have been made, the door is closed and locked and the parts assume the position shown in Fig. 1, when the full force of the vacuum passes between the tubes 0 and D and the carriers are drawn along the tube (1 and pass into the terminal B.

Having thus described my invention and set forth a construction embodying the same, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In an apparatus of the character described, a transmission-tube, a terminal with which said tube communicates, a return-tube outside of the terminal communicating with said transmission-tube, a valve closing said return-tube and adapted to be opened to admit air to the return-tube for breaking the vacuum in the transmission-Lube, and a door to which said valve is connected closing an entrance to the terminal and adapted when opened to open said valve.

2. In an apparatus of the character described, a transmission-tube,a terminal with which said tube comm unicates, a return-tube means independent of the terminal for establishing communication between said returntube and said transmission-tube, a valve closing said return-tube and adapted to be opened to admit air to said return-tube for breaking the vacuum in said transmission-tube, and a door to which said valve is connected closing an entrance to the terminal and adapted when opened to open said valve.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 6th day of 40 January, A. D. 1902.

AUGUST KOENIG.

Witnesses:

E. L. HARLOW, A. L. MESSER. 

